1. Iron truss bridges for railroads. Methods of calculating strains, with a comparison of the most prominent truss bridges, and new formulas for bridge computations; Title: Iron truss bridges for railroads. Methods of calculating strains, with a comparison of the most prominent truss bridges, and new formulas for bridge computations; Date: 1875. Author: Merrill, W. E. (William Emery), 1837-1891. Collecting Area: Rare Books Call number: TG 380 M57 LOCAL